diff --git a/o2android/app/build.gradle b/o2android/app/build.gradle
index 005c7f15e1081d3beee15d7637e19fd089895a07..67baf007be4afd234e29ce02f1bba087d08fef7a 100644
--- a/o2android/app/build.gradle
+++ b/o2android/app/build.gradle
@@ -116,6 +116,9 @@ android {
                                     BAIDU_SPEECH_APPKEY: project.baiduSpeechAppKey,
                                     BAIDU_MAP_APPKEY   : project.baiduMapAppKey,
                                     BUGLY_APPID        : project.buglyAppId]
+            zipAlignEnabled true
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         release {
             signingConfig signingConfigs.release
diff --git a/o2android/app/proguard-rules.pro b/o2android/app/proguard-rules.pro
index e8c37ad9c6c1248f42665dee5f935dd3af967ef5..8a4826b3977544b8e1b61da88248e58ba12f6a8a 100644
--- a/o2android/app/proguard-rules.pro
+++ b/o2android/app/proguard-rules.pro
@@ -558,3 +558,9 @@
 
 -keep class **JNI* {*;}
 
+-keep class io.flutter.app.** { *; }
+-keep class io.flutter.plugin.**  { *; }
+-keep class io.flutter.util.**  { *; }
+-keep class io.flutter.view.**  { *; }
+-keep class io.flutter.**  { *; }
+-keep class io.flutter.plugins.**  { *; }
diff --git a/o2android/app/src/main/java/net/zoneland/x/bpm/mobile/v1/zoneXBPM/app/im/O2ChatActivity.kt b/o2android/app/src/main/java/net/zoneland/x/bpm/mobile/v1/zoneXBPM/app/im/O2ChatActivity.kt
index 810bf074e608362d4eeb4e6a86fa993218760ede..c147309f77ac2b43a8858b0e2fb356838b53cbd4 100644
--- a/o2android/app/src/main/java/net/zoneland/x/bpm/mobile/v1/zoneXBPM/app/im/O2ChatActivity.kt
+++ b/o2android/app/src/main/java/net/zoneland/x/bpm/mobile/v1/zoneXBPM/app/im/O2ChatActivity.kt
@@ -30,7 +30,7 @@ import net.zoneland.x.bpm.mobile.v1.zoneXBPM.model.bo.api.im.IMConversationInfo
 class O2ChatActivity : BaseMVPActivity<O2ChatContract.View, O2ChatContract.Presenter>(), O2ChatContract.View {
 
     companion object {
-        val con_id_key = "con_id_key"
+        const val con_id_key = "con_id_key"
         fun startChat(activity: Activity, conversationId: String) {
             val bundle = Bundle()
             bundle.putString(con_id_key, conversationId)